This bug is fixed by WhatsApp team on 23rd May, 2016 (build no. 2.16.4).
Unable to share NSString object using UIActivityViewControll
With the latest version of whatsapp, Now we can not share both text and URL at the same time.
I tried the below code
NSArray *activityItems= @[someText,[NSURL URLWithString:@"http://www.google.com"]];
With this code i am able to share only the URL link, the whatsApp filtered out the "someText" text.
but the other share apps(SMS etc) able to share both text and url.
hope WhatsApp fixes this issue soon.